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+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{bitter}
+ [2019/05/10 (R.D. Tennent) Supports Bitter fonts for all LaTeX engines.]
+
+\RequirePackage{ifxetex,ifluatex,textcomp}
+
+\newif\ifBitter@ttf
+\ifxetex
+ \Bitter@ttftrue
+\else\ifluatex
+ \Bitter@ttftrue
+\else % [pdf]LaTeX
+ \Bitter@ttffalse
+\fi\fi
+
+\newcommand*{\Bitter@scale}{1}
+\RequirePackage{xkeyval}
+\DeclareOptionX{scaled}{\renewcommand*{\Bitter@scale}{#1}}
+\DeclareOptionX{scale}{\renewcommand*{\Bitter@scale}{#1}}
+
+\DeclareOptionX{type1}{\Bitter@ttffalse}
+
+\ProcessOptionsX\relax
+
+\ifBitter@ttf
+ \RequirePackage{fontspec}
+\else
+ \RequirePackage{fontenc,fontaxes,mweights}
+\fi
+
+\ifBitter@ttf
+ \def\Bitter@regular{Regular}
+ \ifxetex\XeTeXtracingfonts=1\fi
+ \defaultfontfeatures{
+ Ligatures = TeX ,
+ Extension = .ttf ,
+ Scale = \Bitter@scale ,
+ }
+ \setmainfont
+ [ UprightFont = *-Regular ,
+ ItalicFont = *-Italic ,
+ BoldFont = *-Bold ,
+ ]
+ {Bitter}
+ % grab current family in case of subsequent change:
+ \let\Bitterfamily\rmdefault
+
+ \newfontfamily\bitter
+ [ UprightFont = *-Regular ,
+ ItalicFont = *-Italic ,
+ BoldFont = *-Bold ,
+ ]
+ {Bitter}
+
+\else % type1
+
+ \def\bfseries@rm{b}
+ \def\mdseries@rm{m}
+ \def\seriesdefault{\mdseries@rm}
+ \def\bitterfamily{Bitter-TLF}
+ \def\bitter{\fontfamily{\bitterfamily}\selectfont}
+ \def\rmdefault{\bitterfamily}
+
+\fi
+
+% turn off defaults in case other fonts are selected:
+\ifBitter@ttf
+ \defaultfontfeatures{}
+\fi
+
+\endinput
+